i hav an 02 wr426. not had the bike long and its my first 4 stroke. bit of a step up from my tired 92 cr125 so i'm not exactly an expert on these new 4 strokes. anyway.... the bike starts from cold no problem but front of exhaust
is glowing red after a couple of minutes or less at idle. is this normal or running too lean? after about 20 mins running the bike starts to splutter and wont run at low revs and runs ruff and backfires if throttle is fully open until eventually it stops and wont start again until cold no matter how many times u kick it. took plug out and it was black with soot. new plug in, same thing again. sounds like its running too rich? could the pilot be too lean and the main too rich? never heard of that case before.
its a fair bit of a question indeed but hope somone can help